#include<stdio.h>
#include<stdlib.h>

int F(int n) {
    if (n == 0) return 0;
    int a = 1;
    int b = 1;
    int i;
    for (i = 3; i <= n; i++) {
        int c = a + b;
        a = b;
        b = c;
    }
    return b;
}

int main(void) {
    int n;

    printf("\nDigite o valor de n: ");
    scanf("%d", &n);

    printf("\nO %d-esimo termo de Fibonacci eh: %d\n", n, F(n));

    system("pause");
    return 0;
}